Victor Vescovo set the record for the deepest scuba dive in 2019, reaching a depth of 10,928 meters (35,853 feet) in the Mariana Trench.

Sistema Sac Actun is the longest underwater cave system in the world, stretching for over 215 kilometers (134 miles) in the Yucatan Peninsula, Mexico.

Pascal Bernabe set the record for the longest underwater walk in 2004, covering a distance of 100 kilometers (62 miles) in the Mediterranean Sea.

The deepest free-diving record is currently held by William Trubridge, who reached a depth of 130 meters (427 feet) in 2021.

Branko Petrovic set the record for the longest underwater breath-hold in 2018, holding his breath for 11 minutes and 35 seconds.

The Wilhelm Gustloff is the largest underwater shipwreck, with a length of 208 meters (682 feet) and a displacement of 25,484 tons.

Herbert Nitsch holds the record for the most underwater dives, with over 10,000 dives to his name.

The Great Barrier Reef is the largest underwater coral reef in the world, stretching for over 2,300 kilometers (1,430 miles) along the coast of Australia.

Ahmed Gabr set the record for the longest underwater cave dive in 2014, diving for 18 hours and 10 minutes in the Sistema Sac Actun cave system in Mexico.

The Champagne Vent is the deepest underwater hot spring, located at a depth of 2,300 meters (7,546 feet) on the Mid-Atlantic Ridge.

James Cameron set the record for the deepest underwater shipwreck dive in 2012, reaching the wreck of the RMS Titanic at a depth of 3,821 meters (12,539 feet).

Lake Baikal is the largest underwater lake, with a volume of 23,600 cubic kilometers (5,670 cubic miles) and a maximum depth of 1,642 meters (5,387 feet).

Ahmed Gabr set the record for the longest underwater scooter ride in 2014, riding for 18 hours and 10 minutes in the Sistema Sac Actun cave system in Mexico.

The San Rafael Waterfall is the deepest underwater waterfall, with a height of over 100 meters (328 feet) and a depth of over 1,000 meters (3,281 feet).